Circuit-closer for locks



A. F. W. VIEHWEGER.

CIRCUIT CLOSER FOR LOCKS.

APPLICATION FILED SEPT. 10, 1.91.9,

' PatentedSpt. 20,1921.

arm mm err Ivwamfar A. w. VIEHWEGER.

CIRCUIT CLOSER FOR LOCKS.

, APPLICATION Fl-LED SEPT-10, 1919.

Patented Sept. 20, 1921.

2 SHEETS-SHEET 2.

UNITED STATES AUGUST 1. WPVIEHWEGER, OF HOBOKEN, NEW JERSEY, ASSIGNOR OF ONE-HALF PATENT, OFFICE.

TO PAULINE KRONSTEIN, OF JERSEY CITY, NEW JERSEY.

CIRCUIT-CLOSER ron LOCKS.

T 0 all whom it may concern Beit known-that I, AUGUST F. WV. V nnwnonn, a citizen of Germany, residing at Hoboken, in i the county of Hudson and State of New Jersey, have invented certain new. and useful Improvements in Circuit- Closers for Locks; and I'do hereby declare the following to be a full, clear, and exact description of the invention, such as will en able others skilled in the art to which it appertains to make and use the same.

This invention relates to new and useful improvements in circuit closer for looks of the type described, illustrated and claimed in my Patent #1,199,638, and has for one of its objects the provision of means applied to the lock and adapted to close a circuit to an electric alarm if the door to which the lock is applied is pried or forced open with a tool or jimmy.

Another object of this invention is the provision. of an alarm attachment for looks of the above stated character, which shall be simple, durable and eflicient, and which may be manufactured and sold at a comparatively low cost.

With these and other objects in view as will become more apparent as the description proceeds, the invention consists in cer -a lock illustrating the circuit closing means,

Fig. 3 is a bottom plan view of the lock casing illustrating my invention applied thereto,

Fig. 4 is an edge view of the actuating member,

Fig. 5 is a detail sectional view illustrating the actuating member extending into the keeper of the lock,

Fig. 6 is a plan view of a modified form of actuating member.

Referring in detail to the drawings, the numeral 1 indicates as an entirety a lock of the type described, illustrated and claimed Specification 01 Letters Patent.

Application filed September 10, 1919. Serial No. 322,848.

in my Patent Number 1,199,638 and consists of a casing .2 having a locking bolt 3 received within a keeper at. The casing2 is provided with terminal posts 5 and 6 to which conductors 7 and 8 are connected. The terminal post 6 is insulated from the casing 2and has formed thereon a contact 9. Theconductor 8 is connected to an electric hen or alarm 10 and which alarm has connected thereto a conductorll. The conductor 11 is connected to a battery or other electrical source 12 to which is connected the conductor 7. A key guard 13 is mounted within the lock casing 2 and is constructed in accordance with the guard in the above named patent and is provided with a shank 14 that extends through a slot 15 in the bottom wall of the casing and has formed there on a knob or hand grip 16, which is dis posed between the terminal posts 5 and 6. The normal position of the key guard 13 is spaced from the contact 9 so as to break the circuit to the alarm 10.

An elongated actuating member or plate 17 is provided with spaced slots 18 to slidably receive fastening elements 19 secured to the front wall of the casing. A right angled extension 20 is formed upon one end of the member of plate 17 and when the door to which the lock casing is applied is in a closed position, the extension 20 extends into a slot 21 formed within the keeper 4:. An extension 22 is formed upon the other end of the plate or member 17, and extends under the lock casing and against the knob or handle 16 of the key guard 13 so that upon a person prying open the door with a tool or jimmy, the extension 20 extending into the opening 21 of the keeper will hold the plate or member 17 against movement, and owing to the extension 22 being against the knob 16 will cause the key guard 13 to remain stationary while the lock casing moves in relation thereto causing the contact 9 to engage the key guard completing the circuit to the alarm 10. When not desiring to use this device, the plate or member 17 may be slid upon the lock casing 2 so that the extension 22 is spaced from the knob 16 of the key guard 13.

If desired, the plate ormember 17 may have a substantially L-shaped portion 23 having formed upon its free end the extension 20 which fits within a slot 2 1 in the keeper adjacent the locking bolt 3.

WVhile I have shown and described the preferred embodiment of my invention, it will be understood that minor changes in 0011- struction, combination and arrangement of parts may be made without departing from the spirit and scope of the invention as claimed.

Having thus described my invention, what 1 claim is 1. A circuit closer comprising a lock casing having a circuit closing member and a keeper provided with a slot, a plate slidably mounted on the casing, means formed on one end of the plate for engagement with the circuit closing member and means formed on the other end of said plate and adapted to extend into the slot of the keeper.

2. A circuit closer comprising a lock casing having a circuit closing member and a keeper provided with a slot, a plate slidably mounted 011 the casing, an extension formed on one end of said plate and in engagement with the circuit closing memher, and an extension formed on the other end of said plate and adapted to extend into the slot of the keeper.

3(A circuit closer comprising a lock casing having a circuit closing member and a keeper provided with a slot, a plate slidably mounted on the casing, means on one end of said plate for engagement with the circuit closing member, an L-shaped portion formed on said plate and overlying the keeper, an extension formed on the end of the L-shaped portion and extending into the slot of the keeper.

In testimony whereof I aflix my signature in presenceof two Witnesses.

AUGUST F. W. VIEHWEGER.

Witnesses:

ISAAC SUNSHINE, I. KRoNsTEIN. 

